cnn recently featured it here. >> lawrence wright if his new book "going clear." he put scientology under a microscope. he focuses on scientology's obsession with celebrities. it delves into the tight relationship between tom cruise. researching and writing the book he found travolta had a troubled relationship with the church threatened to be outed as a gay. wright follows the leader, at times using physical violence to get his way and punish subordinates. >> cenk: but there are a ton of celebrities who are scientologists. the list goes on. every time i see that list, i get a little disappointed. some of those guys are awesome actors that i really love. i'm not a believer in any of the religions, so, but this one is troubled in some ways, in rewards to the controversies. nowen oh the other hand, they do have 8 million members estimated worldwide. through their large networks of corporations, they've got about $500 million in annual revenue. i want to bring in somebody who knows a thing or two about this religion, the great grandson of the scientology founder l. r